Magnetic properties and magnetocaloric effect (MCE) in the Er<subscript>2</subscript>BaNi<subscript>1−x</subscript>Zn<subscript>x</subscript>O<subscript>5</subscript> oxides.

The magnetocaloric effect (MCE) in various rare earth-based magnetic materials have been well investigated not only due to its potential applications for low-temperature magnetic refrigeration but also for understanding the inherent properties of these materials. Herein, we fabricated the Er 2 BaNi 1−x Zn x O 5 oxides and experimentally investigated their crystal structure, microstructure, magnetic properties, and MCE. All the present studied Er 2 BaNi 1−x Zn x O 5 oxides crystallize in a RE-211 type structure (space group of Pnma) and undergo second-order type magnetic transition within the present measured temperature and magnetic field regions. Considerable low-temperature MCEs were observed in present Er 2 BaNi 1−x Zn x O 5 oxides which were identified by the parameters of magnetic entropy changes, temperature-averaged entropy changes, and relative cooling powers. The present work indicates that the Er 2 BaNi 1−x Zn x O 5 oxides are considerable for low-temperature magnetic refrigeration. [ABSTRACT FROM AUTHOR]

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